Hi, I get a really strange behaviour with the *pushselect* optimizer for this piece of MAL code: http://codepad.org/bqulPEtV . The problem I'm having is, that depending on whether the *pushselect* optimizer is used or not, the query will yield different results. Context info: 1. MonetDB version number: 11.23.3 2. Operating system platform: Linux 4.6.4-1-ARCH #1 SMP PREEMPT Mon Jul 11 19:12:32 CEST 2016 x86_64 GNU/Linux 3. Compiled from source tarball 4. http://codepad.org/bqulPEtV Regards, Moritz